Kackar 50K

Race strategy

Hold a steady pace and save energy for every section.

• Big early climb with 1.3km gain. Hold your pace, save your legs for later.
• Steep 40% wall. Control your pace and stay focused.
• 846m descent. Go easy, save your quads.
• Final 863m descent. Save your legs to go all out on it.
• Control your HR on the first mountain, save your quads on the descents until 23.2km, then run your race pace, and start the final descent from 37.5km under control, then go all out near the bottom.
• Start · 0.0km–1.6km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
• Settle in · 1.6km–9.7km · Climb of 1301m, high point 2420m. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. Hike the steepest pitches.
• Work · 9.7km–23.2km · Descent of 404m averaging 11%, descent of 846m averaging 11%. Plus 1 more climb. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace. This descent is hard on the legs: short steps, stay in control, poles if you have them.
• Fade · 23.2km–37.5km · Climb of 927m. Plus 1 more climb and 1 descent. Your energy fades, and that's normal: hold a steady effort and stop counting the miles. Climb by heart rate or breathing, not pace. Your heart rate drifts down on its own: don't chase your early-race numbers, go by feel.
• Home · 37.5km–48.0km · Descent of 863m averaging 8%. No heroics: settle back into your own effort and hold it to the line. Very long descent: first half under control, then even, let go only near the end.

Course

By gradient, 43% of the distance is uphill, 50% downhill and 7% flat. The longest climb runs 10.2km at an average 9.1% grade (927m of vertical). The longest descent runs 10.4km at an average 8.3% grade (863m of vertical). The steepest climb averages 50.9% over 0.3km. The steepest descent drops at 34.6% over 0.4km. Surface: 31% smooth, 30% trail, and 21% road. Flat-equivalent effort: 69.8 FlatKM.

Poles

Poles bring little benefit here: only about 7.3km of pole-friendly terrain.

Quad damage

Quad damage risk is moderate (index 36 of 100), with 55% of the load in the first half: 2 descents deserve a plan and a couple of downhill sessions before race day.

• Control your HR on the first mountain, save your quads on the descents until 23.2km, then run your race pace, and start the final descent from 37.5km under control, then go all out near the bottom.
• #2 · 9.7–13.4 km · 404 m D−, -10.8% · 34.6 km ahead → control
• #1 · 15.5–23.2 km · 846 m D−, -10.9% · 24.7 km ahead → control
• 33.4–36.1 km · 273 m D−, -10.2% · 11.9 km ahead → your pace
• 37.5–48.0 km · 863 m D−, -8.3% · 0.0 km ahead → even, first half under control, let go at the end

Weather

On race day, start temperatures have historically ranged from 10°C to 21°C, with around 13°C at the highest point; the chance of precipitation is about 38%.

Results

705 finishers completed the 2025 edition. Men's winner: Cole Campbell (United States) in 4:29:19. Women's winner: Jasmin Nunige (Switzerland) in 5:21:52.